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WorksheetsLesson 1 Revision
Total questions: 35
Worksheet time: 17mins
What is the role of Chlorophyll in photosynthesis?
It breaks the hydrogen bonds in water molecules
It converts light energy into chemical energy contained in bonds
It releases absorbs green light waves and reflects all of the other ones
it provides energy for the light dependent reactions
What are the products of photosynthesis?
lipids
carbs and reactants essential for aerobic respiration
starches
carbs and reactants essential for anaerobic respiration
What colour of light is best absorbed by plants?
Red and blue
Green and Yellow
Red and green
Blue and green
Only green
The overall reactions of photosynthesis are best summarized as …
12 CO2 + 6 H2O → C6H12O6 + 12 O2 + 6 H2O.
C6H12O6 + 6 O2 + 6 H2O → 6 CO2 + 12 H2O.
6 CO2 + 12 H2O → C6H12O6 + 6 O2 + 6 H2O.
6 CO2 + 12 H2O → C6H12O6 + 12 O2.
How does the calvin cycle differ from the light reactions?
The calvin cycle takes place in the thylakoid
The calvin cycle takes place in the stroma
The calvin cycle takes place in the mitochondria
The calvin cycle produces ATP to be used in the light dependent reactions
In C4 pathway, which of the following molecules combines with carbon dioxide first?
Glyceraldehyde phosphate
Ribulose bisphosphate
Phosphoenol pyruvic acid
Citric acid
Cyclic photophosphorylation differs from non-cyclic photophosphorylation in that _____________ is not made from the process.
ATP.
PGAL.
NADH.
NADPH
In CAM plants, carbon dioxide is fixed for the first time to …
Ribulose bisphosphate.
Phosphoenolpyruvate.
Glyceraldehyde-3-phosphate.
3-phosphoglycerate.
The role of water molecule in light dependent reaction is to …
Hydrolyse NADP+ at the end of the electron transport chain.
Involve directly in the production of ATP.
Replace the excited electron of reaction centre molecule in photosystem II.
Involve directly in Calvin cycle.
Which of the following plants fixes carbon dioxide at night?
Sugarcane.
Cactus.
Oryza sativa.
Hibiscus rosa-sinensis.
In C4 plants, reactions that fix CO2 into four-carbon compounds occur in …
Guard cells.
Mesophyll cells.
Epidermal cells.
Bundle-sheath cells.
Red and blue light support the highest rates of photosynthesis because …
Chlorophylls absorb light of these wavelengths more than other wavelengths.
These are the only wavelengths that carotenoids cannot absorb.
Light of these wavelengths have the highest energy in the visible spectrum.
Light of these wavelengths activate the ATP synthase enzyme.
In Hatch and Slack Pathway, the primary CO2 acceptor is -
Oxaloacetic acid
Phosphoglyceric acid
Phosphoenol pyruvate
Rubisco
In light reaction, plastoquinone facilitates the transfer of electrons from
Cytb6f complex to PS−I
PS−I to NADP+
PS−I to ATP synthase
PS−II to Cytb6f complex
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:
1 molecule of 3-C compound
1 molecule of 6-C compound
1 molecule of 3-C compound and 1 molecule of 2-C compound
2 molecules of 3-C compound
The first stable product of CO2 fixation in sorghum is
Pyruvic acid
Succinic acid
Oxaloacetic acid
Phosphoglyceric acid
Which of the following statements is incorrect?
RuBisCO is a bifunctional enzyme
In C4 plants, the site of RuBisCO activity is mesophyll cell
The substrate molecule for RuBisCO activity is a 5-carbon compound
RuBisCO action requires ATP and NADPH
Which of the following statements is incorrect?
Both ATP and NADPH+H+ are synthesized during non-cyclic photophosphorylation
Stroma lamellae have PS I only and lack NADP reductase
Grana lamellae have both PS I and PS II
Cyclic photophosphorylation involves both PS I and PS II
What is meant by "seed dispersal"?
the development of seed into a new plant
the spread of seed away from the parent plant
the development of ovule into a seed after fertilization
the spread of seed to the stigma of another flower
An experiment is set-up to investigate the factors required for seed germination.
Predict which seeds will germinate after one week.
A
B
C
D
What is the correct description of pollination?
Pollen grains are transferred from anther to the ovary
Pollen grains are transferred from the anther to the stigma
Pollen grains are transferred from the ovary to the stigma
Pollen grains are transferred from the stamen to the anther
Insect-pollinated flowers typically have
Small, inconspicuous flowers
No scent
Light, powdery pollen grains
Relatively large, and often sticky grains of pollen
The table shows the condition that four samples of seeds were kept in. Which sample would germinate?
A
B
C
D
The diagram shows a section of a flower that has been cross pollinated.
Which statements about this flower are correct?
1. The pollen produced by this flower will be genetically different from the pollen on the stigma
2. The pollen was carried to the stigma by wind
3. This flower is insect- pollinated because the stigma is enclosed by the petals.
4. The pollen was produced by another flower on the same plant
1,2, and 4
1 and 3
3 only
2 and 4 only
The process of the nucleus of the pollen fusing with the nucleus of the ovule is called ________________.
Pollination
Fertilisation
Germination
reproduction
Which part of the flower is usually feathery or sticky?
petals
stigma
anther
nectar
Why are shorea seeds able to be dispersed by the wind?
It is light and has wing-like structure
It has hooks to hook onto the fur of animals
It has a fibrous husk that makes it float
It has dry pods that split open
All the following are the seed dispersal methods, except.......
By wind
By warmth
By animals
By explosive mechanism
What is the name of flower part 4 ?
Stamen
Ovary
Filament
Ovule
Which statement describes a structural adaptation of a wind-pollinated flowers?
They have long filaments so that the anthers hang outside of the flower
They have round,sticky sepals to trap pollen grains
Their large petals protect the stigma
Their stamens are feathery so there is a large surface area
When fertilization has occurred the fertilized ovule changes and so does the ovary.
What do they turn into?
The fertilised ovule turns into honey and the ovary turns into nectar.
The fertilised ovule turns into the fruit and the ovary turns into the seed.
The fertilised ovule turns into a seed and the ovary turns into the fruit or pod.
The ovule grows bigger and the ovary withers.
Which is the main reproductive organ in a flowering plant?
A
B
C
D
Plants disperse their seeds in many ways to prevent overcrowding. Otherwise, the young plants would compete with each other for mainly the following, except...
Carbon dioxide
Sunlight
space
water
